When and why did organs become the central musical instrument in Christian churches? Why an organ over say a piano or even a harp? - Quora
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Mixtuur presents the biggest pipe organs in the world
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Organ | Definition, History, Types, & Facts | Britannica
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The world's largest musical instrument: hear the sound of Atlantic City's... - Classic FM
Mixtuur presents the biggest pipe organs in the world
The History of the Pipe Organ
The world's largest musical instrument: hear the sound of Atlantic City's... - Classic FM
